Major Japanese companies have showcased their latest technologies and initiatives at the CES trade show in the United States.

More than 4,500 firms are participating in the tech show in Las Vegas, one of the biggest of its kind in the world.

Before the opening on Tuesday, Toyota Motor announced it will start tests of a future mobility system at its experimental Woven City in Shizuoka Prefecture, southwest of Tokyo, as early as autumn this year.

Toyota said the futuristic city developed by the automaker will serve as a test course for mobility.

The company also said people will start living there around the same time.

Toyota Chairman Toyoda Akio told a news conference that his company created Woven City to "support new ideas that benefit the planet and its people."

Meanwhile, Sony Group said a joint venture with Honda Motor will release next-generation electric vehicles, with prices starting from nearly 90,000 dollars.

It also unveiled a system that can display 3-D images on a big screen. Officials say the system allows shooting of realistic images of driving and other scenes at low costs.

Sony Group President Totoki Hiroki said: "We believe the future will be exciting. A world envisioned through the lens of creativity and technology brings an even more multi-layered experience, where physical and virtual realities overlap without boundaries."